Eric Coombs, Oregon Department of Agriculture, Bugwood.org - See more at: http://www.forestryimages.org/browse/detail.cfm?imgnum=5436295#sthash.uoaaMFKy.dpuf
Wikimedia Commons
Charles Turner, USDA Agricultural Research Service, Bugwood.org - See more at: http://www.forestryimages.org/browse/detail.cfm?imgnum=0022063#sthash.v68Hck62.dpuf
Wikimedia Commons